Liquid range of ionic liquid – Metal salt mixtures for electrochemical applications
| Autor: | Josefa Salgado, Juan José Parajó, María Villanueva, Luis M. Varela, Oscar Cabeza, Julio R. Rodríguez |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Inorganic chemistry Solvation Salt (chemistry) 02 engineering and technology 010402 general chemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry.chemical_compound Boiling point Differential scanning calorimetry 020401 chemical engineering chemistry Boiling Ionic liquid General Materials Science Ethylammonium nitrate 0204 chemical engineering Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Chemical Thermodynamics. 134:164-174 |
| ISSN: | 0021-9614 |
| Popis: | The effect of the nitrate salt addition on the liquid range of the protic ionic liquid ethylammonium nitrate (EAN) was studied in this work. The salts used were monovalent, LiNO3; divalent, Mg(NO3)2 and Ca(NO3)2, and trivalent, Al(NO3)3; inorganic salts containing metals relevant for electrochemical applications. Solid-liquid transitions, which define the lower limit of the liquid range of the fluids, were determined using differential scanning calorimetry (DSC), whereas the upper limit, which is given by degradation or boiling temperatures, was determined by means of thermogravimetric analysis (TGA). Our results show that salt addition induces melting-point depressions, but no significant boiling point elevations were detected. The so-called nanostructured solvation mechanism is used in order to rationalize the thermodynamics of the mixtures in terms of the occurrence of highly incompressible, low mobility solvation complexes [M(NO3)n]z+−n in the polar cavities of the IL giving rise to pseudo-lattice nanocrystals that are stable in the liquid phase. |
| Databáze: | OpenAIRE |
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